i was riding along the other day and my sled quit on me when i tried to restart the pull chord would not pull the first time then eventually freed up i then let it sit and retarted the sled and started to head home on the way back the sled started to putt so i killed it and then it fully seized. when i got it ome i pulled them plugs they were dry and so i poured some oil down the plugs in hope to free it which it did i then compression tested all the plugs and they read normal about 130-140? any idea ony why it seized? i figure maybe oil pump failure but my coolent also burned off could that be an issue as well? i checked my thermostat thats all good any ideas?